Anyone notice the date on the calendar icon in the invisibleman videos changes to reflect the current day (but not month). I seem to remember that the mail icon also had a notification bubble on how many unread messages.

I'd love to ask just how programmable these icons were, but since no one else who has the SDK (legitimately or not) seems to be as talkative, has anyone else noticed how app icons are used to display notifications?

I'm assuming that when something is pushed to a particular app, there's an API for the notification bar, and probably another for the icon...